since venus and serena have both played acapulco and marbella this year, i was wondering if it was an obligation of a top player to have at least one international level tournament count in their top 16 resultsor if they could just play all grandslams and premiers??

since venus and serena have both played acapulco and marbella this year, i was wondering if it was an obligation of a top player to have at least one international level tournament count in their top 16 resultsor if they could just play all grandslams and premiers??

I didn't read the second part of this post but the internationals do not have to count in their ranking. 10 results are mandatory: 4 slams, 4 mandatories and the best 2 of the Premier 5. The next 6 are the remaining 6 best. The internationals do not have to be a part of that 6 but if mathematically they are, then they obviously count.

A new rule for this year is that if you qualify for the YECs, they will also be mandatory in your ranking.